Metallomesogens: enaminoketone derivatives of the 3-oxa, 3-thia- and 3-selena-butyric amides |
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Authors: | Jadwiga Szyd owska Andrzej Jurkiewicz Adam Kr wczy ski |
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Institution: |
a Department of Chemistry, Laboratory of Dielectrics and Magnetics, 02-089 Warsaw, Poland |
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Abstract: | Liquid crystalline Ni(II) and Cu(II) complexes of tetradentate ligands, enaminoketones and 3-oxa; 3-thia- and 3-selena-butyramides were synthesized and examined. The compounds show very low C1 symmetry resulting from the chiral donor atoms — oxygen, sulphur and selenium — incorporated in the butyric amide moiety. This chirality can be observed in NMR studies. The complexes exhibit enantiotropic as well as monotropic calamitic SmA and N phases. |
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